获取 Android 上的相册列表 [英] Get list of photo galleries on Android

问题描述

我正在寻找:现有照片库名称的列表(希望它们的顶部缩略图也是如此)画廊的内容(然后我可以根据需要加载缩略图和全尺寸)

I'm looking for: A list of the existing photo gallery names (hopefully their top thumbnail as well) The contents of the gallery (I can then load thumbnails and full size as needed)

我将如何获取画廊"列表(不知道这是否是 android 中画廊应用程序中可见图像分组的正确术语...)及其内容?我需要在不使用现有画廊显示的情况下访问其结构中的画廊(我正在创建一个全新的，而不是照片请求者的覆盖层等)

How would I go about getting a list of the "Galleries" (don't know if that's the proper term in android for the groupings of images visible in the Gallery app...) and their contents? I need access to the gallery in it's structure without using the existing gallery display (I'm creating a totally new one, not an over layer to the photo requestor etc.)

我认为 MediaStore.Images 是我需要的地方，但我看不到任何可以给我分组的东西...

I assume MediaStore.Images is where I need to be but I don't see anything that will give me the groupings...

推荐答案

分组由 MediaStore.Images.Media.BUCKET_DISPLAY_NAME 定义.以下是列出图像并记录其存储桶名称和拍摄日期的示例代码:

Groupings are defined by MediaStore.Images.Media.BUCKET_DISPLAY_NAME. Here is the sample code to list the images and log their bucket name and date_taken:

// which image properties are we querying
String[] projection = new String[] {
        MediaStore.Images.Media._ID,
        MediaStore.Images.Media.BUCKET_DISPLAY_NAME,
        MediaStore.Images.Media.DATE_TAKEN
};

// content:// style URI for the "primary" external storage volume
Uri images = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;

// Make the query.
Cursor cur = managedQuery(images,
        projection, // Which columns to return
        null,       // Which rows to return (all rows)
        null,       // Selection arguments (none)
        null        // Ordering
        );

Log.i("ListingImages"," query count=" + cur.getCount());

if (cur.moveToFirst()) {
    String bucket;
    String date;
    int bucketColumn = cur.getColumnIndex(
        MediaStore.Images.Media.BUCKET_DISPLAY_NAME);

    int dateColumn = cur.getColumnIndex(
        MediaStore.Images.Media.DATE_TAKEN);

    do {
        // Get the field values
        bucket = cur.getString(bucketColumn);
        date = cur.getString(dateColumn);

        // Do something with the values.
        Log.i("ListingImages", " bucket=" + bucket 
               + "  date_taken=" + date);
    } while (cur.moveToNext());

}

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